Raman, N., K. Manish, and S. Jain. “PREVALENCE OF ORAL SUBMUCOUS FIBROSIS AND PERIODONTAL HEALTH STATUS IN PATIENTS CHEWING GUTKA FROM BIHAR REGION”. International Journal of Medical and Biomedical Studies, vol. 4, no. 1, Jan. 2020, doi:10.32553/ijmbs.v4i1.863.